feat: Implement core Discord clone functionality including Convex backend, Electron frontend, and UI components for chat, voice, and settings.

convex/reactions.ts

@@ -0,0 +1,61 @@
+import { mutation } from "./_generated/server";
+import { v } from "convex/values";
+
+// Add reaction (upsert - no duplicates)
+export const add = mutation({
+  args: {
+    messageId: v.id("messages"),
+    userId: v.id("userProfiles"),
+    emoji: v.string(),
+  },
+  returns: v.null(),
+  handler: async (ctx, args) => {
+    // Check if already exists
+    const existing = await ctx.db
+      .query("messageReactions")
+      .withIndex("by_message_user_emoji", (q) =>
+        q
+          .eq("messageId", args.messageId)
+          .eq("userId", args.userId)
+          .eq("emoji", args.emoji)
+      )
+      .unique();
+
+    if (!existing) {
+      await ctx.db.insert("messageReactions", {
+        messageId: args.messageId,
+        userId: args.userId,
+        emoji: args.emoji,
+      });
+    }
+
+    return null;
+  },
+});
+
+// Remove reaction
+export const remove = mutation({
+  args: {
+    messageId: v.id("messages"),
+    userId: v.id("userProfiles"),
+    emoji: v.string(),
+  },
+  returns: v.null(),
+  handler: async (ctx, args) => {
+    const existing = await ctx.db
+      .query("messageReactions")
+      .withIndex("by_message_user_emoji", (q) =>
+        q
+          .eq("messageId", args.messageId)
+          .eq("userId", args.userId)
+          .eq("emoji", args.emoji)
+      )
+      .unique();
+
+    if (existing) {
+      await ctx.db.delete(existing._id);
+    }
+
+    return null;
+  },
+});